大月市（日语：大月市／おおつきし）为山梨县东部的市。近年来由于都心回归，该市的人口明显减少。

• 上野原市
• 都留市
• 甲州市
• 笛吹市
• 南都留郡富士河口湖町
• 北都留郡小菅村

Ōtsuki(大月市,Ōtsuki-shi) is a city located in eastern Yamanashi Prefecture, Japan.

As of November 2015, the city had an estimated population of 25,252 and a population density of 90.5 persons per km². The total area was 380.25 square kilometres (146.82 sq mi).